Is polyquaternium-7 safe in hair and skincare?

Polyquaternium-7 is graded as safe in published reviews; it is a conditioning polymer that coats hair and does not penetrate the scalp or skin. It rinses away with water.

What does polyquaternium-7 do?

This polymer reduces frizz, adds shine, and improves comb-through in hair products. It also reduces static and smooths the hair cuticle, making it a common choice in conditioners and leave-in treatments.

Does polyquaternium-7 build up on hair?

With regular shampooing, polyquaternium-7 buildup is unlikely. If products feel heavy or hair looks dull after extended use, switching to a clarifying or chelating shampoo can help reset.

surfactant · emollient

Polyquaternium-7

Generally safe·Strong evidence

A positively charged conditioning polymer used in shampoos and conditioners to reduce frizz and improve manageability. It is well tolerated and has been safely used in cosmetics for decades.

Questions

Is polyquaternium-7 safe in hair and skincare?: Polyquaternium-7 is graded as safe in published reviews; it is a conditioning polymer that coats hair and does not penetrate the scalp or skin. It rinses away with water.
What does polyquaternium-7 do?: This polymer reduces frizz, adds shine, and improves comb-through in hair products. It also reduces static and smooths the hair cuticle, making it a common choice in conditioners and leave-in treatments.
Does polyquaternium-7 build up on hair?: With regular shampooing, polyquaternium-7 buildup is unlikely. If products feel heavy or hair looks dull after extended use, switching to a clarifying or chelating shampoo can help reset.

Products with Polyquaternium-7

References

Cosmetic information for general education, not medical advice. A verdict is a reading of the published evidence, never a guarantee for your skin: any ingredient can irritate someone, so patch test new products and see a professional if you react. Concern is graded on cited evidence, never on hazard-score lists. See how we score.